| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . T A S K I N G . T A S K _ A T T R I B U T E S -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 2014-2022, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNARL was developed by the GNARL team at Florida State University. -- |
| -- Extensive contributions were provided by Ada Core Technologies, Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This package provides support for the body of Ada.Task_Attributes |
| |
| with Ada.Unchecked_Conversion; |
| |
| package System.Tasking.Task_Attributes is |
| |
| type Deallocator is access procedure (Ptr : Atomic_Address); |
| pragma Favor_Top_Level (Deallocator); |
| |
| type Attribute_Record is record |
| Free : Deallocator; |
| end record; |
| -- The real type is declared in Ada.Task_Attributes body: Real_Attribute. |
| -- As long as the first field is the deallocator we are good. |
| |
| type Attribute_Access is access all Attribute_Record; |
| pragma No_Strict_Aliasing (Attribute_Access); |
| |
| function To_Attribute is new |
| Ada.Unchecked_Conversion (Atomic_Address, Attribute_Access); |
| |
| function Next_Index (Require_Finalization : Boolean) return Integer; |
| -- Return the next attribute index available. Require_Finalization is True |
| -- if the attribute requires finalization and in particular its deallocator |
| -- (Free field in Attribute_Record) should be called. Raise Storage_Error |
| -- if no index is available. |
| |
| function Require_Finalization (Index : Integer) return Boolean; |
| -- Return True if a given attribute index requires call to Free. This call |
| -- is not protected against concurrent access, should only be called during |
| -- finalization of the corresponding instantiation of Ada.Task_Attributes, |
| -- or during finalization of a task. |
| |
| procedure Finalize (Index : Integer); |
| -- Finalize given Index, possibly allowing future reuse |
| |
| private |
| pragma Inline (Finalize); |
| pragma Inline (Require_Finalization); |
| end System.Tasking.Task_Attributes; |
